From 4902415c1e95003068343d69206887be0e202615 Mon Sep 17 00:00:00 2001
From: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Date: Tue, 7 Dec 2010 17:46:40 +0100
Subject: Create include/linux/netfilter/ipset/ directory

Separate the ipset header files from netfilter header files.
---
 .../include/linux/netfilter/ipset/ip_set_getport.h | 126 +++++++++++++++++++++
 1 file changed, 126 insertions(+)
 create mode 100644 kernel/include/linux/netfilter/ipset/ip_set_getport.h

(limited to 'kernel/include/linux/netfilter/ipset/ip_set_getport.h')

diff --git a/kernel/include/linux/netfilter/ipset/ip_set_getport.h b/kernel/include/linux/netfilter/ipset/ip_set_getport.h
new file mode 100644
index 0000000..1597fa9
--- /dev/null
+++ b/kernel/include/linux/netfilter/ipset/ip_set_getport.h
@@ -0,0 +1,126 @@
+#ifndef _IP_SET_GETPORT_H
+#define _IP_SET_GETPORT_H
+
+#ifdef __KERNEL__
+#include <linux/icmp.h>
+#include <linux/icmpv6.h>
+#include <linux/netfilter_ipv6/ip6_tables.h>
+#include <net/ip.h>
+
+#define IPSET_INVALID_PORT	65536
+
+/* We must handle non-linear skbs */
+static inline bool
+get_port(const struct sk_buff *skb, int protocol, unsigned int protooff,
+	 bool src, u16 *port, u8 *proto)
+{
+	switch (protocol) {
+	case IPPROTO_TCP: {
+		struct tcphdr _tcph;
+		const struct tcphdr *th;
+
+		th = skb_header_pointer(skb, protooff, sizeof(_tcph), &_tcph);
+		if (th == NULL)
+			/* No choice either */
+			return false;
+
+		*port = src ? th->source : th->dest;
+		break;
+	}
+	case IPPROTO_UDP: {
+		struct udphdr _udph;
+		const struct udphdr *uh;
+
+		uh = skb_header_pointer(skb, protooff, sizeof(_udph), &_udph);
+		if (uh == NULL)
+			/* No choice either */
+			return false;
+
+		*port = src ? uh->source : uh->dest;
+		break;
+	}
+	case IPPROTO_ICMP: {
+		struct icmphdr _icmph;
+		const struct icmphdr *ic;
+
+		ic = skb_header_pointer(skb, protooff, sizeof(_icmph), &_icmph);
+		if (ic == NULL)
+			return false;
+
+		*port = (ic->type << 8) & ic->code;
+		break;
+	}
+	case IPPROTO_ICMPV6: {
+		struct icmp6hdr _icmph;
+		const struct icmp6hdr *ic;
+
+		ic = skb_header_pointer(skb, protooff, sizeof(_icmph), &_icmph);
+		if (ic == NULL)
+			return false;
+
+		*port = (ic->icmp6_type << 8) & ic->icmp6_code;
+		break;
+	}
+	default:
+		break;
+	}
+	*proto = protocol;
+
+	return true;
+}
+
+static inline bool
+get_ip4_port(const struct sk_buff *skb, bool src, u16 *port, u8 *proto)
+{
+	const struct iphdr *iph = ip_hdr(skb);
+	unsigned int protooff = ip_hdrlen(skb);
+	int protocol = iph->protocol;
+
+	/* See comments at tcp_match in ip_tables.c */
+	if (ntohs(iph->frag_off) & IP_OFFSET)
+		return false;
+
+	return get_port(skb, protocol, protooff, src, port, proto);
+}
+
+static inline bool
+get_ip6_port(const struct sk_buff *skb, bool src, u16 *port, u8 *proto)
+{
+	unsigned int protooff = 0;
+	int protocol;
+	unsigned short fragoff;
+
+	protocol = ipv6_find_hdr(skb, &protooff, -1, &fragoff);
+	if (protocol < 0 || fragoff)
+		return false;
+
+	return get_port(skb, protocol, protooff, src, port, proto);
+}
+
+static inline bool
+get_ip_port(const struct sk_buff *skb, u8 pf, bool src, u16 *port)
+{
+	bool ret;
+	u8 proto;
+
+	switch (pf) {
+	case AF_INET:
+		ret = get_ip4_port(skb, src, port, &proto);
+	case AF_INET6:
+		ret = get_ip6_port(skb, src, port, &proto);
+	default:
+		return false;
+	}
+	if (!ret)
+		return ret;
+	switch (proto) {
+	case IPPROTO_TCP:
+	case IPPROTO_UDP:
+		return true;
+	default:
+		return false;
+	}
+}
+#endif /* __KERNEL__ */
+
+#endif /*_IP_SET_GETPORT_H*/
-- 
cgit v1.2.3